使用Java圆角Swing JButton

import javax.swing.*;
import java.awt.*;

public class RoundedButton {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> createGUI());
    }

    private static void createGUI() {
        JFrame frame = new JFrame("Rounded Button");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);

        JPanel panel = new JPanel();
        panel.setLayout(new FlowLayout());

        JButton button = new JButton("Click me!");
        button.setBorder(BorderFactory.createRoundedBorder(10));
        button.setPreferredSize(new Dimension(150, 50));
        button.setFont(new Font("Arial", Font.PLAIN, 16));
        button.setForeground(Color.WHITE);
        button.setBackground(Color.BLUE);
        button.setOpaque(true);

        panel.add(button);
        frame.add(panel);

        frame.setVisible(true);
    }
}